RSTM is currently highly in development and many core features are not there
Please keep in mind that the stuff you can do is highly limited
You can generate a world right now and keep playing in it when the mod is finished since the world gen is mostly complete
This mod requires create 0.0.5 and above
RSTM(RedstoneStick's Tech Mod) is mainly a space exploration mod with being somewhat close to reality.
In it you will be exploiting the natural resources of the overworld to invent revelutionary machines to go to earth orbit, space, moon solar system and eventually the milky way
RSTM is like a create mod addon since it is using a lot of create machinery and mechanics to progress
and this will stay like that, where eventually you will be making a windmill connected to an alternator to charge your space suit in an alien planet until you fix the broken turbine in your nuclear reactor
If you want updates on the mod:
i don't have a dedicated discord server for it but there is a mostly dedicated channel in Infinity SMP discord server
the space-mod-talks is the place i post updates about the mod
it is a shared channel between rstm and frozer(a mod my friend is working on).
if you want just a list of present features you can check github releases on here https://github.com/RedstoneStick/rstm-1.18.2/release
you can also get some new releases a tiny bit earlier than here if i where to finish an update at 3am and go to bed immediately after putting it to github :D